Pitch bearing

Product Advantages
High Operational Precision: The optimized raceway contact stress distribution and high – precision machining technology ensure that the blade angle adjustment error is extremely small, which is conducive to improving the power generation efficiency of wind turbines.
Strong Fatigue Resistance: In view of the frequent start – stop and alternating load working conditions of blades, the material selection and heat treatment process of pitch bearings are strictly controlled. This enables them to have excellent anti – fatigue performance and reduces the probability of early failure.
Low Maintenance Cost: The reliable sealing and lubrication design reduces the frequency of lubricant replacement and maintenance. This lowers the operation and maintenance cost of wind farms, especially for offshore wind turbines where maintenance is difficult.
Application Fields
They are core components for the pitch system of all types of wind turbine blades. Each wind turbine is usually equipped with three pitch bearings corresponding to three blades respectively. They are widely used in small and medium – power onshore wind turbines with power below 5MW and large offshore wind turbines with power above 6MW. International brands such as SKF and Schaeffler, as well as domestic enterprises like Luoyang LYC Bearing and ZWZ Bearing, all provide mature pitch bearing products to meet the needs of different wind power application scenarios.

Pitch Bearings of Wind Power Pitch bearings are installed at the root of wind turbine blades. They are responsible for adjusting the blade angle to control the wind energy capture efficiency, and can also adjust the blade position in extreme weather to protect the unit. The following are their detailed parameters and characteristics: Structural Characteristics The common structures are double – row four – point contact ball bearings or full complement cylindrical roller bearings. These structures can cope with the high dynamic loads caused by frequent start – stop of blades. Similar to yaw bearings, high – performance pitch bearings also apply the non – soft zone quenching technology to enhance the uniformity of raceway hardness. Meanwhile, the integrated design of the gear ring is adopted in their structure, which improves the accuracy of blade angle adjustment. The refined design of the lubrication system ensures that the bearings can still maintain good lubrication performance during frequent mechanical movements. Processing Size Range Their size is relatively smaller than that of yaw bearings. The outer diameter usually ranges from 1000mm to 2500mm. This size range can well match the installation space at the root of wind turbine blades. For large – size blades of megawatt – class wind turbines, the size of the matched pitch bearings will be adjusted according to the blade weight and load requirements. Product Advantages